EP2321398A2 - Mash tun for producing beer and stirrer for a mash tun - Google Patents
Mash tun for producing beer and stirrer for a mash tunInfo
- Publication number
- EP2321398A2 EP2321398A2 EP09771997A EP09771997A EP2321398A2 EP 2321398 A2 EP2321398 A2 EP 2321398A2 EP 09771997 A EP09771997 A EP 09771997A EP 09771997 A EP09771997 A EP 09771997A EP 2321398 A2 EP2321398 A2 EP 2321398A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mash
- stirring blade
- stirrer
- vessel according
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12C—BEER; PREPARATION OF BEER BY FERMENTATION; PREPARATION OF MALT FOR MAKING BEER; PREPARATION OF HOPS FOR MAKING BEER
- C12C7/00—Preparation of wort
- C12C7/04—Preparation or treatment of the mash
- C12C7/06—Mashing apparatus
- C12C7/065—Mashing apparatus with a vertical stirrer shaft
Definitions
- the invention relates to a mash vessel for beer production with at least one stirrer according to the preamble of claim 1. Furthermore, the invention relates to a stirrer which can be used for the production of mash vessels according to the invention.
- heated mash vessels such as a mash tun or a mash tun pot, are used for receiving, tempering and mixing the mash.
- the known mash vessels have a stirrer in the bottom region, which serves to achieve a uniform temperature distribution in the mash heated above the bottom of the mash vessel.
- the mixing of the mash with the stirrer serves to achieve the greatest possible homogeneity of the mash.
- the usual stirrers for mash vessels are made of sheet metal plates, which have flat or grooved leading surfaces and extending straight radially outward. These stirrer shapes known today have arisen from the bar stirrers with a very low inflow area.
- the stirrers usually used in mash vessels are axially conveying stirrers, which have a poor homogeneity with respect to deliver on the temperature distribution. As a result of this very angular design of the known stirrers, considerable shear stresses occur in the mash when in contact with the stirring vanes, which are undesirable.
- a mash vessel with a stirrer is known for example from DE 195 05 808 C l.
- the invention is based on the basic idea that the stirrer blades of the stirrer, which are used predominantly vertically standing, no longer extend in a straight line radially outward, but have a bow-like design and extend arcuately radially outward.
- the curved shape of the stirring blades ensures that the mash displaced on the stirring blades flows in a largely laminar flow along the stirring blade and the resulting shear stresses are thereby reduced.
- Which type of curvature the stirrer blades of the stirrer have is basically arbitrary. It is particularly advantageous if the stirring blades have a curvature, so that the front of the stirring blade in
- Rotation direction is at least partially curved. Due to this convex curvature on the front side of the stirring blade, a largely laminar flow along the stirring blade is made possible radially outwards. light.
- the stirrer type described here is thus, in contrast to the stirrers already used, a radial stirrer.
- the front side of the stirring blade is curved in the direction of rotation, at least in sections, in the shape of an involute.
- the number of stirring blades on the stirrer can be adapted to a wide variety of requirement profiles. For most applications, a stirrer with several, especially three, stirring blades is advantageous.
- a central hub can be provided on the stirrer. At this center hub can then be brought into engagement with the drive shaft for the agitator.
- the stirring blades themselves are fastened to the outer circumference of the central hub, for which purpose they can either be flange-mounted or welded.
- the center hub has a circular outer periphery.
- a prismatic, in particular triangular, outer circumference can also be selected, wherein the number of sides of the prismatic outer circumference should be matched to the number of stirring blades.
- sheet metal sections can be bent by bending deformation until they have the desired arcuate shape. It is also quite conceivable that a plurality of sheet metal sections bent separately and then connected to each other at interfaces, in particular welded together, are.
- the sheet-metal sections for producing the stirring blades can also be folded in sections so that an arcuate polygonal profile forms along the longitudinal axis of the stirring blade.
- the stirring blade has two sections.
- the first section of the stirring blade which extends radially outwardly from the central hub of the stirrer, is rectilinearly shaped along its longitudinal axis and has no curvature.
- a second section which extends in an arc-shaped manner radially outward, then adjoins this first section.
- the first, straight section forms 1/3 of the diameter of the stirrer and the second, arcuate section 2/3 of the diameter of the stirrer.
- the stirring blade can also be provided that the lower edge of the stirring blade of the contour of the bottom of the mash vessel following upwards. In other words, this means that the distance between the lower edge of the stirring blade and the bottom of the mashing vessel along the entire length of the stirring blade is always the same.
- the lower edge of the stirring blade in the direction of the free end not only arcuately radially outward, but also extend arcuately upwards.
- the lower edge of the stirring blade thus runs double arcuate in this embodiment.
- the upper edge of the stirring blade should extend as parallel as possible to the lower edge of the stirring blade so that the stirring blade itself has the same width throughout its entire longitudinal axis.
- a flow-guiding element can also be arranged at the free end of the stirring blade. With this flow guide, the mash flow can be deflected, with the mash flow on the flow guide should be directed upward as possible.
- At least one recess and / or at least one recess may be provided, in which the mash can flow through the stirring blade. This can be specifically influenced on the mash flow in the field of stirring blade.
- At least one recess is arranged on the lower edge of the stirring blade.
- an additional flow guide is additionally arranged, with which the mash flow can be deflected in particular radially outward.
- At least one recess may also be provided between the lower edge and the upper edge of the stirring blade. Also behind this recess, a flow guide should be arranged, with which the mash flow can be deflected in particular downwards.
- the flow guide elements arranged behind the recesses have a closed, in particular circular, flow cross section, wherein the flow cross section narrows in the flow direction.
- the narrowing flow guide elements then form nozzle-shaped flow channels, in which the flow velocity of the throughflowing wort increases.
- at least one fixed flow breaker is arranged on the inner circumference of the mash vessel. At this flow breaker, the outwardly flowing mash can be reversed and / or deflected, thereby achieving a gentle homogenization of the mash.
- a plurality of flow breakers can be arranged one above the other in the vertical direction, wherein between the adjacent ones
- the stirrers in the mash vessel rotate about a centric drive axis.
- the stirrer rotates about an axis of rotation extending eccentrically with respect to the center axis of the mash vessel. This eccentricity of the stirrer increases the temperature homogeneity.
- the stirrer according to the invention for the production of the mash vessels according to the invention in turn has agitator blades, which extend radially outwards at least in sections along their longitudinal axis.
- FIG. 1 shows a first embodiment of a stirrer for a mash vessel in a perspective view.
- FIG. 2 shows the stirrer according to FIG. 1 in top view
- FIG. 3 shows the stirrer according to FIG. 1 in a lateral view
- FIG. 4 shows the center hub of the stirrer according to FIG. 1 in top view
- FIG. 5 shows a second embodiment of a stirrer for a mash vessel in a perspective view
- FIG. 6 shows the stirrer according to FIG. 5 in top view
- FIG. 7 shows the stirrer according to FIG. 5 in a lateral view
- FIG. 8 shows the central hub of the stirrer according to FIG. 5 in top view
- FIG. 9 shows the stirrer according to FIG. 5 when arranged in a mash vessel with flow breakers in a perspective view
- FIG. 10 shows a third embodiment of a stirrer with recesses and recesses in the stirring blade in a perspective view
- FIG. 1 1 shows a fourth embodiment of a stirrer with recesses in the agitating blade and arranged behind it, nozzle-shaped flow-guiding elements in a perspective view;
- FIG. 12 shows a stirring blade of the stirrer according to FIG. 11 in cross section along the section line I-L
- Fig. 1 shows in perspective view a stirrer 01 intended for use in a mash vessel for beer production.
- the stirrer 01 has three stirring blades 02, which are provided for mixing the mash in the mash vessel.
- the stirring blades 02 are welded or flanged at the end to a central hub 03.
- the center hub 03 which is circular on the outer circumference, can be brought into engagement on its inner circumference on a drive shaft in order to transmit the torque required for driving the stirrer 01.
- Fig. 2 shows the stirrer 01 with the three stirring blades 02 in top view.
- the stirring blades 02 each comprise two sections 04 and 05.
- the first section 04 which adjoins the central hub 03, is rectilinear in this case and is produced from a flat sheet-metal section.
- an arcuately curved section 05 connects.
- the facing in the direction of rotation 06 front side 07 of the stirring blades 02 is thus convexly curved in the region of the sections 05 to allow a laminar mash flow as possible along the stirring blades 02 radially outward.
- the diameter of the circumferential circle 08 which is defined by the outer ends of the first sections 04, corresponds to just 1/3 of the total circumference circle 09 of the stirrer 01.
- Fig. 3 shows the stirrer 01 with the stirring blades 02 in a lateral view.
- the lower edges 11 of the stirring blades 02 in the direction of the free end of the stirring blades 02 extend arcuately upwards relative to a reference level 10 and can thus each extend at the same distance from the bottom of a mash vessel, not shown in cross-section ,
- the upper edge 12 of the three stirring blades 02 in each case runs parallel to the lower edge 11.
- FIG. 4 shows the central hub 03 of the stirrer 01 with the first sections 04 attached thereto, which extend in a straight line to the outside.
- a groove 13 is provided on the inner circumference of the center hub 03.
- FIG. 5 shows a second embodiment 14 of a stirrer according to the invention, which in turn has a circular central hub 15 and three stirring blades 16.
- the stirrer 14 differs from the stirrer oil in that the first sections 17 of the stirrer blades 16, which in each case are adjoined by a second section 18, are also arcuately shaped, so that the stirrer blades 16 are entirely of their own free end to the connection point on the central hub 15 form an involute arc.
- Fig. 7 shows the stirrer 14 in a side view. Again, the lower edges 20 of the stirring blades 16 are curved in turn arcuately upwards and the upper edges 21 are parallel to the lower edges 20th
- FIG. 8 shows the central hub 15 with the arc-shaped first sections 17.
- FIG. 9 shows the stirrer 14 with the involute-shaped agitating blade 16 arranged above the bottom 22 of a mash vessel 23.
- a plurality of flow crushers 24 are arranged vertically one above the other, wherein the superposed flow crushers 24 each have a vertical distance 25.
- FIG. 10 shows a third embodiment 26 of a stirrer according to the invention.
- the stirring blades 27 of the stirrer 26, which are only partially shown in FIG. 10, have recesses 28 on the lower edge of the stirring blade 27. Behind each recess 28, a flow guiding element 29 is provided in order to deflect the mash through which the recesses 28 flow.
- stirring blades 27 each have two recesses 30, which are also flowed through by the mash. Behind the failures, in each case, in each case a flow-guiding element 31 is provided for deflecting the mash flow.
- the stirring blades 27 are also equipped at their feien end each with a supplementary flow guide 32.
- FIGS. 1 and 12 show a fourth embodiment of a stirrer with circular recesses 35 in the three stirring blades 34. Behind the recesses 35, nozzle-shaped flow guiding elements 36 are arranged whose circular flow cross-section narrows in the direction of flow in order to increase the flow velocity of the passing wort increase and thereby cause turbulence at the exit from the nozzle-shaped flow guide 36.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Food Science & Technology (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008030720 | 2008-07-01 | ||
PCT/DE2009/000867 WO2010000227A2 (en) | 2008-07-01 | 2009-06-24 | Mash tun for producing beer and stirrer for a mash tun |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2321398A2 true EP2321398A2 (en) | 2011-05-18 |
EP2321398B1 EP2321398B1 (en) | 2014-09-24 |
EP2321398B9 EP2321398B9 (en) | 2014-12-17 |
Family
ID=41351740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09771997.5A Not-in-force EP2321398B9 (en) | 2008-07-01 | 2009-06-24 | Mash tun for producing beer and stirrer for a mash tun |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2321398B9 (en) |
DK (1) | DK2321398T3 (en) |
WO (1) | WO2010000227A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111171979A (en) * | 2018-11-09 | 2020-05-19 | 南通中集安瑞科食品装备有限公司 | Saccharification pot and stirring device thereof |
DE102018130010A1 (en) * | 2018-11-27 | 2020-05-28 | Rüdiger Thrun | Brewing device |
CN110117536A (en) * | 2019-06-14 | 2019-08-13 | 纳来创硕湖北生物科技有限公司 | The saccharification system and method for saccharifying of starch sugar |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1642758A1 (en) * | 1967-07-20 | 1971-05-19 | Ziemann Gmbh A | Brewing vessel with agitator |
GB2071693B (en) * | 1979-07-02 | 1983-06-02 | Briggs & Co Ltd S | Discharging granular materials |
DE3132205C1 (en) * | 1981-08-14 | 1983-03-10 | Bernhard Dipl.-Braum. 8710 Kitzingen Lenz | Stirrer for circular, combined mash and wort coppers |
DE19505808C1 (en) | 1995-02-21 | 1995-12-14 | Bernhard Lenz | Mash tun mixing flights with perforations, variable pitch and floor clearance |
DE29517343U1 (en) * | 1995-10-30 | 1996-01-25 | Anton Steinecker Maschinenfabrik GmbH, 85356 Freising | Agitator blade rotor for mash containers |
DE10123812A1 (en) * | 2001-05-16 | 2002-11-21 | Steinecker Maschf Anton | Mashing tank has tubular rotor arms terminating in upwards-directed elbow with flange tab to heater |
DE202005018302U1 (en) * | 2005-11-23 | 2006-12-28 | Kantelberg, Bernd | Stirrer useful in brewery mashing vessels comprises blades mounted eccentrically on the hub of a shaft |
-
2009
- 2009-06-24 DK DK09771997.5T patent/DK2321398T3/en active
- 2009-06-24 EP EP09771997.5A patent/EP2321398B9/en not_active Not-in-force
- 2009-06-24 WO PCT/DE2009/000867 patent/WO2010000227A2/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010000227A2 * |
Also Published As
Publication number | Publication date |
---|---|
DK2321398T3 (en) | 2015-01-05 |
EP2321398B1 (en) | 2014-09-24 |
WO2010000227A2 (en) | 2010-01-07 |
EP2321398B9 (en) | 2014-12-17 |
WO2010000227A3 (en) | 2010-10-21 |
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